DE3269530D1 - A method for cleaning gas mixtures which might contain dust from a urea plant - Google Patents
A method for cleaning gas mixtures which might contain dust from a urea plantInfo
- Publication number
- DE3269530D1 DE3269530D1 DE8282111944T DE3269530T DE3269530D1 DE 3269530 D1 DE3269530 D1 DE 3269530D1 DE 8282111944 T DE8282111944 T DE 8282111944T DE 3269530 T DE3269530 T DE 3269530T DE 3269530 D1 DE3269530 D1 DE 3269530D1
- Authority
- DE
- Germany
- Prior art keywords
- urea plant
- washing solution
- gas mixtures
- cleaning gas
- formaline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/10—Venturi scrubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/04—Regenerating the washing fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Gas mixtures from a urea plant, particularly such mixtures containing dust and especially off-gases from prilling towers or granulation units are cleaned. In order to prevent precipitation and accretion in the cleaning unit, there is applied an aqueous washing solution to which formaldehyde is added before it is brought in contact with the gas mixture. Formaldehyde is preferably added in the form of formaline, and the addition of formaline is regulated by pH-measurements in the washing solution such that pH is maintained at pH=6-8.5. The pH of the washing solution is preferably kept at pH=about 7, especially in order to obtain optimal removal of ammonia. The method is carried out during application of standard scrubbers in which aqueous washing solutions can be used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO820030A NO150667C (en) | 1982-01-07 | 1982-01-07 | PROCEDURE FOR CLEANING OF GAS MIXTURES FROM UREA PRODUCTION PLANTS |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3269530D1 true DE3269530D1 (en) | 1986-04-03 |
Family
ID=19886388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8282111944T Expired DE3269530D1 (en) | 1982-01-07 | 1982-12-23 | A method for cleaning gas mixtures which might contain dust from a urea plant |
Country Status (8)
Country | Link |
---|---|
US (1) | US4507129A (en) |
EP (1) | EP0084669B1 (en) |
AT (1) | ATE18202T1 (en) |
BR (1) | BR8300031A (en) |
CA (1) | CA1192381A (en) |
DE (1) | DE3269530D1 (en) |
IN (1) | IN158998B (en) |
NO (1) | NO150667C (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1249057B (en) * | 1991-05-22 | 1995-02-11 | Agrimont Spa | PROCESS FOR BLASTING AMMONIA CONTAINED IN A BREATHER WITH A LIQUID. |
DK70693D0 (en) * | 1993-06-14 | 1993-06-14 | Niels Ole Vesterager | PROCEDURE FOR REMOVAL OF UNUSUAL SUBSTANCES IN A GAS TYPE |
FR2740355B1 (en) * | 1995-10-27 | 1998-01-16 | Cos Ingenierie | PROCESS FOR AMMONIACAL DEPOLLUTION OF LIQUID OR GASEOUS EFFLUENTS |
TW201032887A (en) * | 2009-01-13 | 2010-09-16 | Saipem Spa | Process for the recovery of ammonia from a gaseous stream |
EP2662349A1 (en) | 2012-05-08 | 2013-11-13 | Uhde Fertilizer Technology B.V. | Urea granulation process with scrubbing system |
AU2014284776B2 (en) * | 2013-07-05 | 2018-01-18 | Stamicarbon B.V. | Removal of dust in urea finishing |
CN105916838B (en) * | 2013-11-15 | 2019-04-09 | 斯塔米卡邦有限公司 | The method of soluble particles is removed for the device and method from gas stream arrested particles and from gas |
US10913025B2 (en) | 2014-12-19 | 2021-02-09 | Stamicarbon B.V. | Removal of dust in urea finishing |
US10730002B2 (en) | 2016-05-09 | 2020-08-04 | Stamicarbon B.V. | Submicron particle removal from gas streams |
EP3652152B1 (en) | 2017-07-14 | 2021-11-17 | Stamicarbon B.V. | Urea finishing and off-gas treatment plant and process |
CN107185332A (en) * | 2017-07-19 | 2017-09-22 | 郑金风 | A kind of new and effective urea recovering-washing tower |
CN107854945A (en) * | 2017-12-05 | 2018-03-30 | 中国华电科工集团有限公司 | A kind of flue gas purification system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE802457C (en) * | 1947-07-30 | 1951-02-12 | Basf Ag | Process for the preparation of hexamethylenetetramine |
US2977386A (en) * | 1955-04-08 | 1961-03-28 | Allied Chem | Absorption of formaldehyde in alkaline urea solution |
DE1128849B (en) * | 1959-09-14 | 1962-05-03 | Ici Ltd | Process for the production of fine-grain urea |
SU504546A1 (en) * | 1973-11-14 | 1976-02-28 | Method for automatic control of the absorption process | |
IT1004432B (en) * | 1974-03-28 | 1976-07-10 | Snam Progetti | PROCEDURE FOR THE RECOVERY OF POL VER OBTAINED FROM EQUIPMENT FOR THE TREATMENT OF QUID OR SOLID LIQUID MATERIALS |
GB1493612A (en) * | 1974-07-06 | 1977-11-30 | Fisons Ltd | Prilling |
JPS5318466A (en) * | 1976-08-05 | 1978-02-20 | Mitsubishi Heavy Ind Ltd | Charging method for oxygen-containing hydrocarbons and/or their precursors into exhaust gas |
US4104041A (en) * | 1976-12-08 | 1978-08-01 | Chiyoda Chemical Engineering & Construction Co., Ltd. | Apparatus and method for treating waste gas from urea prilling tower |
JPS5378974A (en) * | 1976-12-22 | 1978-07-12 | Kouriyuu Kougiyou Kk | Method of collecting dusts generated in sintering plant |
-
1982
- 1982-01-07 NO NO820030A patent/NO150667C/en unknown
- 1982-12-22 US US06/452,045 patent/US4507129A/en not_active Expired - Fee Related
- 1982-12-23 DE DE8282111944T patent/DE3269530D1/en not_active Expired
- 1982-12-23 AT AT82111944T patent/ATE18202T1/en not_active IP Right Cessation
- 1982-12-23 EP EP82111944A patent/EP0084669B1/en not_active Expired
- 1982-12-24 CA CA000418638A patent/CA1192381A/en not_active Expired
- 1982-12-30 IN IN944/DEL/82A patent/IN158998B/en unknown
-
1983
- 1983-01-05 BR BR8300031A patent/BR8300031A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BR8300031A (en) | 1983-09-13 |
EP0084669B1 (en) | 1986-02-26 |
US4507129A (en) | 1985-03-26 |
EP0084669A1 (en) | 1983-08-03 |
ATE18202T1 (en) | 1986-03-15 |
NO150667B (en) | 1984-08-20 |
NO820030L (en) | 1983-07-08 |
CA1192381A (en) | 1985-08-27 |
NO150667C (en) | 1984-11-28 |
IN158998B (en) | 1987-03-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3269530D1 (en) | A method for cleaning gas mixtures which might contain dust from a urea plant | |
US4612175A (en) | Flue gas desulfurization/denitrification using metal-chelate additives | |
DE69312884D1 (en) | Process for cleaning gases using absorption solutions containing amine | |
JPS55149676A (en) | Method of purifying waste water containing urea and preparation of melamine | |
ATE16983T1 (en) | METHOD OF CLEANING EXHAUST GASES. | |
DE3868645D1 (en) | METHOD FOR SIMULTANEOUS NITROGENING AND DESULVERIFYING OF AN OXYGEN-EXHAUST GAS. | |
MY8600489A (en) | Process for the removal of urea ammonia and carbon dioxide from dilute aqueous solutions | |
ATE74532T1 (en) | PROCESS FOR REMOVAL OF NITROUS OXIDES FROM A FLUE GAS STREAM. | |
ES8504439A1 (en) | Apparatus for treating cellulose-containing matter, e.g. straw, with gaseous ammonia | |
ATE17473T1 (en) | METHOD FOR RECOVERING USEABLE COMPOUNDS FROM UREA SYNTHESIS FLOW. | |
DE69209739T2 (en) | Multi-purpose agent for preventing and removing incrustations | |
DE3760105D1 (en) | Process for preventing the corrosion of apparatus | |
ATE80565T1 (en) | PROCESS FOR REMOVAL OF NOX FROM FUMES FROM THE MANUFACTURE OF FERTILIZER. | |
US4647441A (en) | Method for the regeneration of washing solution utilized for simultaneous washing of nitrous oxide and sulfur dioxide from exhaust gases | |
DE3761470D1 (en) | METHOD FOR REMOVING STICKOXYDES FROM EXHAUST GASES. | |
JPS54102285A (en) | Purifying method for exhaust gas of municipal incinerator | |
ATE13047T1 (en) | ANTI-NITRIFIC AGENT AND PROCESS FOR ITS PREPARATION. | |
JPS62171731A (en) | Apparatus for treating exhaust gas of glass melting furnace | |
JPS54104649A (en) | Removal of ammoniac nitrogen in waste water | |
JPS53119780A (en) | Treating method for exhaust gas | |
JPS5541851A (en) | Decreasing nitrogen and sulfur compound and cod in waste water | |
JPS57135031A (en) | Wet denitration method | |
JPS5432173A (en) | Wet treating method for exhaust gas | |
JPS5362779A (en) | Treating method for waste solution from wet simultaneous desulfurizationand denitration apparatus for exhaust combustion gas | |
Pirogov | Chemical Cleaning of Gas Ejections From a Descaling Department |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |